If you experience a malfunctioning of your garage door opener, it’s frustrating. Luckily, those openers from LiftMaster, Chamberlain and Craftsman manufactured after 2012 can help you pinpoint the problem using flashing indicator lights. These more recent openers come with the Security+ 2.0 system and MyQTM technology. To make sure this is what you have, there is a yellow LEARN button on the back or side of the motor housing.

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Most of the abnormal situations shown in the following table are related to the photo-eye reversal system. Either the photo eye units have gone out of alignment from an inadvertent knock, or the wires connecting the motor or the units were cut or poorly installed.

On the rear of the motor housing, there are indicator arrows, one pointing up and the other down. Count the number times these arrows blink and refer to the following table. This will help you identify the cause and make the necessary corrections.

Number of blinks

DOWN ARROW

UP ARROW

1

1

Problems

The opener does not close and lights are flashing.

Solutions

Photocells (safety sensors) are not installed, connected or wires may be cut. Inspect sensor wires to see if they are disconnected or cut.

Number of blinks

DOWN ARROW

UP ARROW

1

2

Problems

The opener does not close and the main LED light is flashing.

Solutions

One photocell wire is cut or wires are reversed. Inspect them and correct if needed.

Number of blinks

DOWN ARROW

UP ARROW

1

3

Problems

The door control does not work.

Solutions

Check the door control wires for a short or a reversed wire. Also, inspect photocell wires at all staple points and connection points. Replace or correct as needed.

Number of blinks

DOWN ARROW

UP ARROW

1

4

Problems

The opener does not close and the main lights are flashing.

Solutions

Photocells are misaligned or obstructed. Realign sensor boxes and so that the LED lights are steady and not flashing. If there’s an obstruction in the sensors’ path, clear it.

Number of blinks

DOWN ARROW

UP ARROW

1

5

Problems

The garage door moves 6 – 8 inches stops and reverses.

Solutions

Open and close the door manually. Check for binding or obstructions. Check also wiring connections at the travel module and at the logic board.

Number of blinks

DOWN ARROW

UP ARROW

1

5

Problems

No movement, only a single click.

Solutions

Open and close the door manually. Check for binding or obstructions. Replace logic board if necessary.

Number of blinks

DOWN ARROW

UP ARROW

1

5

Problems

The opener hums for 1 to 2 seconds without any movement.

Solutions

Open and close the door manually. Check for binding or obstructions. Contact a garage door specialist.

Number of blinks

DOWN ARROW

UP ARROW

1

6

Problems

The door slides after it has come to a complete stop.

Solutions

Program the travel to the right position or balance the garage door.

Number of blinks

DOWN ARROW

UP ARROW

2

1 to 5

Problems

No movement or no sound.

Solutions

The logic board must be replaced.

Number of blinks

DOWN ARROW

UP ARROW

3

2

Problems

Unable to set or keep the settings.

Solutions

Check the travel module for a proper assembly. Replace if needed.

Number of blinks

DOWN ARROW

UP ARROW

3

3

Problems

The battery status LED is constantly flashing.

Solutions

Battery backup charging has a circuit error. If it’s so, change the battery.

Number of blinks

DOWN ARROW

UP ARROW

4

1 to 4

Problems

The door is moving, stops and / or reverses for no apparent reason.

Solutions

Open and close the door manually. Check for binding or obstructions. If the door is not binding or sticking, reprogram the travel.